MCAS 1998, 10th Grade Math, Questions 17 to 20

Question #17

The two graphs show Carol's drive from home to school and from school to home. What is the difference in her average speed in miles per hour for the two trips?

A. 5 mph

B. 10 mph

C. 15 mph

D. 20 mph

 

 

Question #18

The table below reflects the number of different handshakes (H) for groups of n relatives.

For any size gathering of people, which formula gives the correct number of handshakes for n people?

A. H = [n(n + 1)] / 2

B. H = (n - 1)2 / 2

C. H = [n(n - 1)] / 2

D. H = (n2 + 1) / 2

Question #19

The spreadsheet above consists of 20 cells. Each cell is identified by its column and row. For example, cell C4 contains the number 10. Using the formula E1 = B3 + 2(C1 + D4), what value should be placed in cell E1?

A. —33

B. —17

C. 13

D. 17

Question #20

The lengths of three sides of a triangle are in the ratio of 3:4:5 and the perimeter of the triangle is 48 inches. The length of the longest side of the triangle is

A. 15 inches.

B. 20 inches.

C. 25 inches.

D. 28 inches.

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